<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script src="vue.js"></script>
    <div id="app">
        <h1 v-if="isShow">表达式的值为真，就能显示</h1>
    </div>
<script type="text/javascript">
    var vm=new Vue({
        el:'#app',
        data:{
            isShow:true
        }
    });
</script>
</body>
</html>